Choose the system of equations which matches the following graph:

Question

periodicninja · Answer

attachment

periodicninja · Answer

A: 5x − y = 7 
2x − y = 0

B: 5x − y = 7 
2x + y = 0

C: 5x + y = −7 
2x + y = 0

D: 5x + y = −7 
2x − y = 0

kgrendel0324 · Answer

You need help?

periodicninja · Answer

yeah

kgrendel0324 · Answer

okay so lets put them in slope-intercept form

kgrendel0324 · Answer

lets put 5x-y=7 and 5x+y=-7 in slope intercept form

periodicninja · Answer

ok

kgrendel0324 · Answer

y=5x-7 is the slope intercept form of 5x-y=7

periodicninja · Answer

yes

kgrendel0324 · Answer

y=-5x-7 is slope intercept form of 5x+y=-7

kgrendel0324 · Answer

so which one of those two lines do you see graphed?

kgrendel0324 · Answer

Do you need help identifying which one of those two lines in on the graph?

periodicninja · Answer

but they are the same line

kgrendel0324 · Answer

No,  5x+y=-7 and 5x-y=7 are two different lines.

periodicninja · Answer

oh you typed them practically the same before

kgrendel0324 · Answer

the first one has a y-intercept of -7 and a slope of -5, while the second one has a y-intercept of -7 and a slope of +5.

periodicninja · Answer

the second one

kgrendel0324 · Answer

Yes, 5x-y=7 is on the graph. Now use the process of elimination to get rid of the two answers that dont have that equation.

periodicninja · Answer

B?

kgrendel0324 · Answer

Are you saying thats the answer or thats one we are eliminating?

periodicninja · Answer

no i eliminated down to it. cause while you were  typing i went and tried to graph the two with that and b was the answer

kgrendel0324 · Answer

Okay yeah, thats the right answer. Good Job! :D

periodicninja · Answer

have a good day :)

kgrendel0324 · Answer

You too my friend